Sewing machine



H. W. KRAG SEWING MACHINE May 2, 1933.

Filed March 14, 1932 /A/ VISA/T02:

1/15 HTTo ENEKS,

,lro

Patented May 2,1933 .c

HARRYW. KRAG, OF sT. LOUIS MISSOURI,ASSI GNOR TO AfiERICANSHOEMACHINERY v AND TOOL COMPANY, QEST. LOUIS, MISSOURL A CORPORATION OF MISSOURI SEWING MAC IN 1 Application filed Ma r ch 14,' '1932'.. ;seri 1$ ,598,541) i This invention relates to sewing machines,

particularly to shoe sewing machines of the curved needle and avvl type; The object of the invention is to provide a simple and compact arrangement ofthestitcher head parts that will afford clearance between such parts and the shoe solesuflicient to permit shoe soles having narrow shanks to be shiftedto a position to enable theneedle and-awl" to 'ent gage such narrow shanks without forclng or;

distorting the shoe. Other objects are cheapness of construction, ease: of assembly and fewness of parts. The invention consists in the parts and in thecombinations and arrangemen'ts ofparts hereinafter described and claimed. 7 i

In the accompanying drawing, which forins part of the specification and wherein likesymbols refer occur, I

ig. 1 is a side view of a portion of a shoe sole sewing machine embodying my invention, 7

Fig. 2 is a front'view of theparts shown in 1 onr] to like parts wherever they release thewoik. v a

p In accordance with common practice, aux

iliary means are provided for holding usual'springmeans (not shown) for swingarm, whereby said lever may be manually operated to raise the pressure foot 6 and tlnis presser foot 6 down upon the fwor'k; As

, shown in the draWing,-said meansusually comprises an auxlhary presser footarm'll 'ing said leverin'a direction that will cause a the press'er foot 6 to yieldably engage the 5 has an up: n

which is jonrnaledat' one end on a boss 12 formed on one s i'de of the presser foot lever extends rcarwardly above the rearwardly exs tending arm ofsaidpresser foot lever andis Said stud is pivotally connected by a pivot Screw, 14 t e 3 l'n of the; Dresser f Ot lever 5 and extends upwardly th ou aVbO-SIS v 5 concentricjto thepivotal axis thereof and, v

yielda'bly connected thereto by' a Istu'df13. i

respective pawls. By this arrangement, one

of the pawls 25 will engage the ratchet 24 on the rear arm of the presser foot lever 5 to prevent upward movement of the presser foot 6 after the auxiliary pressure has been applied thereto. When the cam lever 20 is swung downwardly to disengage the pawl 18 from the ratchet 21 on the auxiliary presser foot arm 11, the pawls 25 are disengaged from the ratchet 24 by the engagement of a cam ,28 on said cam lever with arms 29 that extend rearwardly from the pawls 25.

Mounted on a horizontal shaft30 fixed to the stitcher head 1 .above the pivot pin or shaft 3 for the presser foot lever 5 is a thread lifter lever 31 whose rearwardly extending arm is adapted to be actuated by means of theusual cam lever 32 and whose forwardly extending arm is provided with the usual thread lifter 33. One end of the thread lifter lever shaft 30 is rigidly supported and braced by means of a brace member in the form of i i the inner face of the latter by'means ofa pivot screw 39. The upper arm of the hand an arm 34, which is formed integral with the corresponding end of the presser foot lever pivot pin or shaft 3. The brace member 34 extends upwardly fromthe presser foot lever shaft 3 and is provided at its upper end with an opening adapted to receive and support the adjacent end of the thread lifter lever shaft 30, said end of said brace memher being split, as at 35, and provided with a screw 36 whereby it may be firmly clamped to said thread lifter lever shaft. As shown in Fig, 3, the front lower end portion of the thread lifter shaft support and brace member 34 of the pressure foot lever shaft is beveled off, as at 37 thereby affording clearance between said end of said brace and the shoe sole Asufiicient to permit shoe soles having narrow shank portions to be swung inwardly far enough to enable the needle (not shown) andthe awl 9 to engage such narrow shank without forcing or distorting the shoe. The pawls 18 and 25 are manually disengaged from the ratchets 2'1 and 24, respectively, on the presser foot lever 5 and auXiliary presser-foot arm 11 by means of a hand release lever38, which is located between said auxiliary presser foot arm and the brace member or arm 34 and is pivotally secured to release lever 38 forms a handle for swinging the same about the pivot screw 39, and the lower arm of saldlever 1s connected by means of a pivot screw 40 with the forward end pawls 18 and 25 to disengage them from the ratchets 21 and 24. A coil spring 46 has one end secured to the brace member or arm 34 of the presser foot lever shaft 3 and has its other end fixed to a pin 47 on the lower arm of the hand release lever 38 and serves to hold the fingers of the pawl release arm 41 in a position which will permit the pawls 18 and 25 to engage the ratchets 21 and 24, respectively, on the presser foot levcr 3 and on the auxiliary presser foot arm 11.

The construction hereinbefore described is simple, economical and easy to operate and assemble. It is strong and durable and contains a minimum number of compactly arranged parts, it provides a one-piece member which pivotally supports the presser foot lever and the pawl release hand lever, it braces and supports the thread lifter lever shaft audit provides the shoe clearance required for sewing deep shank shoe soles.

YVhat I claim is:

1. In a shoe sole sewing machine of the curved needle and awl type, a stitcher head, a presser foot lever, a thread lifter l6VG].,' l shaft mounted in said stitcher head and pivota .l'y supporting said thread lifter lever, and a shaft located below the thread lifter lever shaft and pivotally supporting said presser foot lever, the presser foot lever shaft being provided at one end with an integral upward- 7 ly projecting arm that is secured to the corresponding, end of the thread lifter lever shaft to support and brace the same.

2. In a shoe sole sewing machine of the curved needle and awl type, a stitcher head,

a presser foot lever. a thread lifter lever, a

shaft mounted in said stitcher'head and pivotall-y supporting said thread iifter lever, and a shaft mounted in said stitcher head below said thread lifter lever and pivot-ally supporting said presser foot lever,:the presser foot lever. shaft being provided at one end with an integral upwardly extending arm that is secured to the corresponding end of the thread lifter lever shaft for supporting and bracing the same, the lower end portion of said arm. being beveled of where it joins the presser foot lever shaft to provide increased shoe clearance.

30111 a shoe sole sewing machine of the curvedncedle and awl type, a stitcher head, a presser foot lever, a thread lifter lever, a shaft mounted in said stitcher head for pivotal ly supporting said thread lifter lever, a shaft located below the thread lifter lever shaft for pivotall'y supporting said presser foot lever, the presser foot lever shaft being prov ded at one end wlth an integral upwardly pr-o1ect1ngarm that is secured to the corresponding end of said thread lifter lever shaft for supporting andbracing the same, and a pawl release lever pivotally supported on the integral arm portion of said presser foot lever shaft. I

4. In a shoe sole sewing machine of the curved needle and awltype, a stitcher head, a presser foot lever, a thread lifter lever, a

shaft mounted in saidstitcherh'ead for pivotally supportin said thread lifter lever, a shaft located be ow the thread lifter shaft for pivotally sup orting said presser foot lever, the presser oot lever shaft being provided at one end with aninte ral upwardly projecting arm that is secured I sponding end of said thread lifter lever shaft for supporting and bracing the same, and an auxiliary presser foot arm cooperating with said presser foot lever and pivotally mounted on the same for swinging movement about the axis of said presserfoot'lever shaft.

5. In a shoe sole sewing machine of the. curved needle and. awl type, a stitcher head, 7 a presser footl'ever, a thread lifter lever, a

shaft mounted in said stitcher head for pivotally supporting said thread lifter lever, a

shaft located. below the thread lifter shaft for pivotally supporting saidpresser foot y lever, the presser foot lever shaft being proresponding ends of said presser foot lever and t of March, 1932.

vided at one end with an integral upwardly projecting arm that is secured to the correv sponding end of said thread lifter lever shaft for supporting and bracing the same, an auxiliary presser foot arm cooperating with said presser foot lever and pivotally mounted on the same for swinging movement about the axis of said presser foot lever shaft, the corsaid presser foot arm being provided with ratchets, pawls pivotally supported on said i machine and cooperating with said ratchets,

and alever journaled on the integral arm of said presser foot lever shaft for disengaging said pawls from said ratchets. I Signed at St. Louis, Missouri, this 11th day HARRY w; ,KRAG.

to the corre- 

